.payment-nav .cards li{
    width: 3.12rem;
    height: 1.5rem;
    float: left;
    border: solid 1px #c7c8ca;
    border-radius: 0.03rem;
    margin: 0.1rem;
}

.payment-nav .cards li img{
    height: 0.8rem;
    margin: 0.35rem auto 0;
    display: block;
}